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Finding the Third Proportional to 280.50 and 607.88

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Solution

The third proportional to 280.50 and 607.88 is: 1,317.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    280.50 : 607.88 = 607.88 : x
  2. Step 2: Convert to fraction form
    280.50/607.88 = 607.88/x
  3. Step 3: Cross multiply
    280.50x = 607.88 × 607.88
  4. Step 4: Simplify right side
    280.50x = 369,512.02
  5. Step 5: Solve for x
    x = 369,512.02/280.50
  6. Step 6: Final answer
    x = 1,317.33

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.